--- /dev/null
+/* Display a cleared blue window. This demo has no dependencies on
+ * any utility code, just the graw interface and gallium.
+ */
+
+#include "state_tracker/graw.h"
+#include "pipe/p_screen.h"
+#include "pipe/p_context.h"
+#include "pipe/p_shader_tokens.h"
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+
+#include "util/u_debug.h" /* debug_dump_surface_bmp() */
+#include "util/u_memory.h" /* Offset() */
+
+enum pipe_format formats[] = {
+ PIPE_FORMAT_R8G8B8A8_UNORM,
+ PIPE_FORMAT_B8G8R8A8_UNORM,
+ PIPE_FORMAT_NONE
+};
+
+static const int WIDTH = 300;
+static const int HEIGHT = 300;
+
+static struct pipe_screen *screen = NULL;
+static struct pipe_context *ctx = NULL;
+static struct pipe_surface *surf = NULL;
+static void *window = NULL;
+
+struct vertex {
+ float position[4];
+ float color[4];
+};
+
+static struct vertex vertices[4] =
+{
+ { { 0.0f, -0.9f, 0.0f, 1.0f },
+ { 1.0f, 0.0f, 0.0f, 1.0f }
+ },
+ { { -0.9f, 0.9f, 0.0f, 1.0f },
+ { 0.0f, 1.0f, 0.0f, 1.0f }
+ },
+ { { 0.9f, 0.9f, 0.0f, 1.0f },
+ { 0.0f, 0.0f, 1.0f, 1.0f }
+ }
+};
+
+
+
+
+static void set_viewport( float x, float y,
+ float width, float height,
+ float near, float far)
+{
+ float z = far;
+ float half_width = (float)width / 2.0f;
+ float half_height = (float)height / 2.0f;
+ float half_depth = ((float)far - (float)near) / 2.0f;
+ struct pipe_viewport_state vp;
+
+ vp.scale[0] = half_width;
+ vp.scale[1] = half_height;
+ vp.scale[2] = half_depth;
+ vp.scale[3] = 1.0f;
+
+ vp.translate[0] = half_width + x;
+ vp.translate[1] = half_height + y;
+ vp.translate[2] = half_depth + z;
+ vp.translate[3] = 0.0f;
+
+ ctx->set_viewport_state( ctx, &vp );
+}
+
+static void set_vertices( void )
+{
+ struct pipe_vertex_element ve[2];
+ struct pipe_vertex_buffer vbuf;
+ void *handle;
+
+ memset(ve, 0, sizeof ve);
+
+ ve[0].src_offset = Offset(struct vertex, position);
+ ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+ ve[1].src_offset = Offset(struct vertex, color);
+ ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+
+ handle = ctx->create_vertex_elements_state(ctx, 2, ve);
+ ctx->bind_vertex_elements_state(ctx, handle);
+
+
+ vbuf.stride = sizeof( struct vertex );
+ vbuf.max_index = sizeof(vertices) / vbuf.stride;
+ vbuf.buffer_offset = 0;
+ vbuf.buffer = screen->user_buffer_create(screen,
+ vertices,
+ sizeof(vertices),
+ PIPE_BIND_VERTEX_BUFFER);
+
+ ctx->set_vertex_buffers(ctx, 1, &vbuf);
+}
+
+static void set_vertex_shader( void )
+{
+ void *handle;
+ const char *text =
+ "VERT\n"
+ "DCL IN[0]\n"
+ "DCL IN[1]\n"
+ "DCL OUT[0], POSITION\n"
+ "DCL OUT[1], COLOR\n"
+ " 0: MOV OUT[1], IN[1]\n"
+ " 1: MOV OUT[0], IN[0]\n"
+ " 2: END\n";
+
+ handle = graw_parse_vertex_shader(ctx, text);
+ ctx->bind_vs_state(ctx, handle);
+}
+
+static void set_fragment_shader( void )
+{
+ void *handle;
+ const char *text =
+ "FRAG\n"
+ "DCL IN[0], COLOR, LINEAR\n"
+ "DCL OUT[0], COLOR\n"
+ " 0: MOV OUT[0], IN[0]\n"
+ " 1: END\n";
+
+ handle = graw_parse_fragment_shader(ctx, text);
+ ctx->bind_fs_state(ctx, handle);
+}
+
+
+static void set_geometry_shader( void )
+{
+ void *handle;
+ const char *text =
+ "GEOM\n"
+ "PROPERTY GS_INPUT_PRIMITIVE TRIANGLES\n"
+ "PROPERTY GS_OUTPUT_PRIMITIVE TRIANGLE_STRIP\n"
+ "DCL IN[][0], POSITION, CONSTANT\n"
+ "DCL IN[][1], COLOR, CONSTANT\n"
+ "DCL OUT[0], POSITION, CONSTANT\n"
+ "DCL OUT[1], COLOR, CONSTANT\n"
+ "0:MOV OUT[0], IN[0][0]\n"
+ "1:MOV OUT[1], IN[0][1]\n"
+ "2:EMIT\n"
+ "3:MOV OUT[0], IN[1][0]\n"
+ "4:MOV OUT[1], IN[0][1]\n" /* copy color from input vertex 0 */
+ "5:EMIT\n"
+ "6:MOV OUT[0], IN[2][0]\n"
+ "7:MOV OUT[1], IN[2][1]\n"
+ "8:EMIT\n"
+ "9:ENDPRIM\n"
+ "10:END\n";
+
+ handle = graw_parse_geometry_shader(ctx, text);
+ ctx->bind_gs_state(ctx, handle);
+}
+
+static void draw( void )
+{
+ float clear_color[4] = {1,0,1,1};
+
+ ctx->clear(ctx, PIPE_CLEAR_COLOR, clear_color, 0, 0);
+ ctx->draw_arrays(ctx, PIPE_PRIM_TRIANGLES, 0, 3);
+ ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+ screen->flush_frontbuffer(screen, surf, window);
+}
+
+
+static void init( void )
+{
+ struct pipe_framebuffer_state fb;
+ struct pipe_resource *tex, templat;
+ int i;
+
+ /* It's hard to say whether window or screen should be created
+ * first. Different environments would prefer one or the other.
+ *
+ * Also, no easy way of querying supported formats if the screen
+ * cannot be created first.
+ */
+ for (i = 0;
+ window == NULL && formats[i] != PIPE_FORMAT_NONE;
+ i++) {
+
+ screen = graw_create_window_and_screen(0,0,300,300,
+ formats[i],
+ &window);
+ }
+
+ ctx = screen->context_create(screen, NULL);
+ if (ctx == NULL)
+ exit(3);
+
+ templat.target = PIPE_TEXTURE_2D;
+ templat.format = formats[i];
+ templat.width0 = WIDTH;
+ templat.height0 = HEIGHT;
+ templat.depth0 = 1;
+ templat.last_level = 0;
+ templat.nr_samples = 1;
+ templat.bind = (PIPE_BIND_RENDER_TARGET |
+ PIPE_BIND_DISPLAY_TARGET);
+
+ tex = screen->resource_create(screen,
+ &templat);
+ if (tex == NULL)
+ exit(4);
+
+ surf = screen->get_tex_surface(screen, tex, 0, 0, 0,
+ PIPE_BIND_RENDER_TARGET |
+ PIPE_BIND_DISPLAY_TARGET);
+ if (surf == NULL)
+ exit(5);
+
+ memset(&fb, 0, sizeof fb);
+ fb.nr_cbufs = 1;
+ fb.width = WIDTH;
+ fb.height = HEIGHT;
+ fb.cbufs[0] = surf;
+
+ ctx->set_framebuffer_state(ctx, &fb);
+
+ {
+ struct pipe_blend_state blend;
+ void *handle;
+ memset(&blend, 0, sizeof blend);
+ blend.rt[0].colormask = PIPE_MASK_RGBA;
+ handle = ctx->create_blend_state(ctx, &blend);
+ ctx->bind_blend_state(ctx, handle);
+ }
+
+ {
+ struct pipe_depth_stencil_alpha_state depthstencil;
+ void *handle;
+ memset(&depthstencil, 0, sizeof depthstencil);
+ handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
+ ctx->bind_depth_stencil_alpha_state(ctx, handle);
+ }
+
+ {
+ struct pipe_rasterizer_state rasterizer;
+ void *handle;
+ memset(&rasterizer, 0, sizeof rasterizer);
+ rasterizer.cull_face = PIPE_FACE_NONE;
+ rasterizer.gl_rasterization_rules = 1;
+ handle = ctx->create_rasterizer_state(ctx, &rasterizer);
+ ctx->bind_rasterizer_state(ctx, handle);
+ }
+
+ set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
+ set_vertices();
+ set_vertex_shader();
+ set_fragment_shader();
+ set_geometry_shader();
+}
+
+
+int main( int argc, char *argv[] )
+{
+ init();
+
+ graw_set_display_func( draw );
+ graw_main_loop();
+ return 0;
+}
projects / mesa.git / commitdiff